Hooked on Science: Salty egg

Materials

• Two clear plastic cups
• Water
• Salt
• Two uncooked eggs

Instructions

• STEP 1: Fill one of the clear plastic cups halfway with water. Describe the water using its observable properties.
• STEP 2: Place an uncooked egg into the water. Does the egg sink or float?
• STEP 3: Fill the other cup halfway with water. Add half a cup of salt to the water and mix. Describe the water using its observable properties.
• STEP 4: Place the other uncooked egg into the salted water. Does the egg sink or float?

Explanation

Adding salt to the water makes the water denser, which allows the egg to float. The egg sinks in the water without salt because the egg is denser than the water.